Steven Matz rejoined the team before Tuesday’s game against Philadelphia and appears poised to start Saturday in Miami. Even though the Mets and their gifted young left-hander are playing it coy about when he will pitch, his return makes a deep starting rotation even deeper.

“I’m just here to help these guys win. That’s all I can do, is just to go out whenever I pitch and try to win the game for the team,’’ Matz said. “The fans are really into it, the team’s winning games and it’s really exciting to be here.’’

The Mets reportedly will skip Noah Sydergaard’s start Saturday, with Matz sliding into his spot, then reprise their earlier six-man rotation, according to ESPN.

Skipping Syndergaard has the dual purpose of conserving his innings (his 152 has exceeded last year’s total) and lining up Jon Niese, Matt Harvey and Jacob deGrom for next week’s NL East showdown with second-place Washington. But it’s a possibility the Mets refused to be pinned down on.

“As far as I know I’m still making my start on Saturday,’’ said Syndergaard.

“It’s possible. He could start in Miami,’’ general manager Sandy Alderson told The Post, which was more forthcoming than manager Terry Collins.

“Sometime soon,’’ Collins said before the game. Asked if he cared to share how soon, he replied, “Nope. Not really.” When asked if it was safe to assume Matz would start in Miami, Collins said, “You can assume anything you want. It’s your prerogative. … I will make my decision known when it happens.’’

Whenever it happens, Matz makes the Mets’ strength even stronger, even with just two big league starts under his belt.

“He’s done pretty well both times, so he’s lived up to all the expectations anybody ever had of him,” Collins said of Matz, who went 2-0 with a 1.32 ERA before being sidelined with a lat strain. “Right now he’s coming off the health issue. We think he’s going to be OK. He’s fine. Obviously with the way he’s throwing his last two starts, his command’s pretty good. His stuff speaks for itself. I haven’t seen him in his last two starts, but everybody says he’s ready to go.”

“It was bittersweet because I had to shut it down after those two outings,” Matz said. “I had a lot of fun. So it is bittersweet. I’m just going to try to pick up where I left off and help these guys win. I was a little worried about having the time off, you lose your sharpness. But I feel I was able to get that back in my rehab stint, so I’m happy with that and I’m going to try to pick up where I left off.’’

Matz looked close to replicating that form in his last rehab start Monday for Double-A Binghamton, when he tossed 5 ¹/₃ scoreless innings of one-hit ball, striking out four. But his next outing will be against big league hitters, possibly pitching for a spot on the postseason roster.

“I’m not even really thinking about that,’’ Matz said. “It’s going to be my first start back. [I’m] just going to take it day-by-day, week-by-week, start-by-start, and go from there, let the rest kind of fall into place … whatever they feel [is best].’’

So far the Mets have felt Matz is best-suited as a starter, because of missing 2010-2011 with Tommy John surgery and a lack of experience getting warmed up quickly, with just one relief appearance in Triple-A. But it’s possible that could be revisited for the postseason.

“I’ll do whatever they ask,’’ Matz said. “Whatever I can do to help them win, that’s what I’ll do.’’